27 Pa. Stat. § 186
Any real estate in this Commonwealth held by, or in trust for, a corporation, chartered under the laws of this Commonwealth, but not authorized under the laws of this Commonwealth to hold the same, and heretofore conveyed after said unauthorized holding to a citizen of the United States, or to a corporation authorized under the laws of this Commonwealth to hold the same, is hereby declared, where no inquisition has been heretofore instituted against the said real estate to escheat the same by reason of such unauthorized holding, to be free and clear of any right of escheat by this Commonwealth by reason of said unauthorized holding, and such citizen or corporation grantee, as aforesaid, and his or its respective heirs, successors and assigns shall in such case hold said real estate indefeasible as to any right of escheat by this Commonwealth by reason of said unauthorized holding.
27 P.S. § 186